and how is the average, non-lawyer laymen EVER supposed to figure all this out?
"Ignorance of the law is no excuse" is so far out of whack it is not even funny. It is very, very true that someone could be completely clueless about the law, and no I do not believe we all should have to need JD's to keep ourselves out of trouble.
I understand where you're coming from. Trust me, I do.
And I used to think the exact same thing - I remember having the explicit thought in the past of "why does the law need to be so damned complex that I'm not sure whether what I'm doing is illegal or not?"
And then, a few things happened.
First, I got a law degree and realized that the more complicated the law is, the better my job security is. There's a direct correlation there.
Second, I got some experience. Despite the desire to have things be simple and readily understandable, we live in a complex world. Look at aviation, for example. It's ridiculously complex; our collective aviation experience has told us that there are many things that can go wrong - from the quality of gasoline to the possibility of a pilot using a medication that he doesn't know might reduce his abilities. Complex problems generally require complex answers: it's not enough to have a regulation saying "don't do anything that puts others at risk." Instead, you have to have a regulation saying "no pilot can use drugs commonly going by the trade names of X, Y, and Z, but that have the following specific chemical structure."
Third, I've found that people often overcomplicate the law. How many people have ever sat down and taken a look at their state's criminal law? Absent some things involving sciency stuff (like the measurements for the Intoxilyzer 2000), the laws are pretty easy to understand. "Thou shalt not run red lights," or "if thou killest thy wife, thou beist guilty of first degree murder in the course of domestic violence." It's really not terribly complex.
Even what we're discussing here isn't that complex. Guy got busted for a DUI (which is a crime that many if not most of us have committed, except most of us haven't gotten caught), and has to report it to the FAA, regardless of the outcome. The mechanism giving the FAA the authority to require that is a little more complex, but not terribly so - it's just a matter of something like 25 words in the Constitution.
So, I think in general - and take this with a grain of salt, because I spend all day with my nose in the Constitution and the Colorado Revised Statutes - that, while there's effort involved (as with anything), having a basic grasp of both legal principles and the law itself is well within the average person's grasp. It's just that the average person isn't going to take a Saturday to read the Constitution instead of (flying) (watching football) (crushing beers at the frat house).
Now, zoning codes. They're another story. My brain hurts just thinking about the things - and I know how they work.